Message Center Warning Chime
WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The message center warning chime feature is to draw the driver's attention to the message center display to view each new warning message. The IC provides a single one-second tone whenever a new warning message is displayed in the message center. If multiple warning messages are present, the IC sounds a chime for each of the warning messages that are present.